//
//  Student.h
//  base_m_07_@class关键字
//
//  Created by China Dragon on 2023/1/30.
//

#import <Foundation/Foundation.h>
//#import "Book.h"//import 耗性能
@class Book;

NS_ASSUME_NONNULL_BEGIN

@interface Student : NSObject{
    Book *_book;
}

@property Book *book;

@end

NS_ASSUME_NONNULL_END
